Best Python code snippet using lisa_python
topology_manager.py
Source: topology_manager.py
2class TopologyManager:3 def __init__(self):4 self.graph = nx.Graph()5 def add_switch(self, switch_identifier):6 if self.exists_switch(switch_identifier):7 return False8 description = {9 "type": "switch"10 }11 self.graph.add_node(switch_identifier, description = description)12 return True13 def remove_switch(self, switch_identifier):14 if not self.exists_switch(switch_identifier):15 return False16 self.graph.remove_node(switch_identifier)17 for host in self.hosts():18 host_description = self.graph.node[host]["description"]19 switch_identifier_connected_to = host_description["switch_identifier_connected_to"]20 if switch_identifier_connected_to == switch_identifier:21 self.graph.remove_node(host)22 return True23 def switches(self):24 switches = []25 for node in self.graph.nodes(data ="description"):26 node_identifier = node[0]27 node_type = node[1]["type"]28 if node_type == "switch":29 switches.append(node_identifier)30 return switches31 def add_host(self, host_identifier):32 if self.exists_host(host_identifier):33 return False34 description = {35 "type": "host"36 }37 self.graph.add_node(host_identifier, description = description)38 return True39 def update_host(self, host_identifier, **host_parameters):40 if not self.exists_host(host_identifier):41 return False42 for parameter, parameter_value in host_parameters.items():43 self.graph.node[host_identifier]["description"][parameter] = parameter_value44 return True45 def remove_host(self, host_identifier):46 if not self.exists_host(host_identifier):47 return False48 self.graph.remove_node(host_identifier)49 return True50 def hosts(self):51 hosts = []52 for node in self.graph.nodes(data ="description"):53 node_identifier = node[0]54 node_type = node[1]["type"]55 if node_type == "host":56 hosts.append(node_identifier)57 return hosts58 def add_link(self, node_from_identifier, node_to_identifier, node_from_port, node_to_port):59 if not self.graph.has_node(node_from_identifier) or not self.graph.has_node(node_to_identifier):60 return False61 if self.exists_link(node_from_identifier, node_to_identifier):62 return False63 description = {64 "type": "link",65 ("port_" + node_from_identifier): node_from_port,66 ("port_" + node_to_identifier): node_to_port67 }68 self.graph.add_edge(node_from_identifier, node_to_identifier, description = description)69 print(self.topology())70 return True71 def remove_link(self, node_from_identifier, node_to_identifier):72 if not self.graph.has_node(node_from_identifier) or not self.graph.has_node(node_to_identifier):73 return False74 if not self.exists_link(node_from_identifier, node_to_identifier):75 return False76 self.graph.remove_edge(node_from_identifier, node_to_identifier)77 return True78 def links(self):79 edges = []80 for edge in self.graph.edges():81 edges.append(edge)82 return edges83 def exists_switch(self, switch_identifier):84 exists = self.switches().__contains__(switch_identifier)85 return exists86 def exists_host(self, host_identifier):87 exists = self.hosts().__contains__(host_identifier)88 return exists89 def exists_link(self, node_from_identifier, node_to_identifier):90 exists = self.graph.has_edge(node_from_identifier, node_to_identifier)91 return exists92 def clear_topology(self):93 self.graph.clear()94 # REST API95 def topology(self):96 topology = {97 "nodes": {...
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